The effect of microorganisms and heavy metals on the exudation of low molecular weight organic compounds by plant roots

The aim of our research was to study the effect of growth-promoting rhizobacteria (Pseudomonas oryzihabitans and Variovorax paradoxus) and toxic elements (Al, Cd and Hg) on the root exudation in various pea (Pisum sativum L.) genotypes. For this, methods of periodic cultures, gnotobiotic plant-microbial systems, ICPE and UPLC were used. It was established that rhizobacteria actively utilized organic acids and sugars secreted by the roots and contributed to an increase in pH and Al immobilization in the rhizosphere. Cadmium increased the exudation of many substances of pea line SGE, but this effect was more pronounced in the mutant SGECdt. Stimulation of the exudation of amino acids was detected during Hg treatment to a greater extent in wild-type SGE. The combined action of Cd and Hg did not lead to a further increase in exudation. The results obtained indicate various mechanisms of exudation of the studied fractions, while the most pronounced differences are observed between the fractions of amino acids or sugars with organic acids. Exudation of organic acids plays an important role in the decreased stability and accumulation of Hg by the pea mutant SGECdt.

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Amino acids, organic acids and sugars present in mycelium of Alternaria triticina and A. tenuis

Transactions of the British Mycological Society ◽

10.1016/s0007-1536(76)80180-5 ◽

1976 ◽

Vol 67 (3) ◽

pp. 498-499 ◽

Cited By ~ 3

Author(s):

C.S.K. Vijaya Kumar ◽

A.S. Rao

Keyword(s):

Amino Acids ◽

Organic Acids ◽

Organic Acids And Sugars

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Rhizobacterial biofilm and plant growth promoting trait enhancement by organic acids and sugars

Biofouling ◽

10.1080/08927014.2020.1832219 ◽

2020 ◽

Vol 36 (8) ◽

pp. 990-999

Author(s):

Jishma Panichikkal ◽

Radhakrishnan Edayileveetil Krishnankutty

Keyword(s):

Plant Growth ◽

Organic Acids ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Organic Acids And Sugars

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Metabolism of amino acids, organic acids and sugars extracted from the xylem fluid of four host plants by adult Homalodisca coagulata

Entomologia Experimentalis et Applicata ◽

10.1111/j.1570-7458.1989.tb02384.x ◽

1989 ◽

Vol 50 (2) ◽

pp. 149-159 ◽

Cited By ~ 80

Author(s):

Peter C. Andersen ◽

Brent V. Brodbeck ◽

Russell F. Mizell

Keyword(s):

Amino Acids ◽

Organic Acids ◽

Host Plants ◽

Xylem Fluid ◽

Homalodisca Coagulata ◽

Organic Acids And Sugars

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Reactions between Amino-Acids, Organic Acids and Sugars in Freeze-dried Apricots

Nature ◽

10.1038/1771082c0 ◽

1956 ◽

Vol 177 (4519) ◽

pp. 1082-1083 ◽

Cited By ~ 14

Author(s):

E. F. L. J. ANET ◽

T. M. REYNOLDS

Keyword(s):

Amino Acids ◽

Organic Acids ◽

Freeze Dried ◽

Organic Acids And Sugars

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Profiling of volatile and non-phenolic metabolites—Amino acids, organic acids, and sugars of green tea extracts obtained by different extraction techniques

Food Chemistry ◽

10.1016/j.foodchem.2019.05.194 ◽

2019 ◽

Vol 296 ◽

pp. 69-77 ◽

Cited By ~ 13

Author(s):

Protiva Rani Das ◽

Youngmok Kim ◽

Seong-Jin Hong ◽

Jong-Bang Eun

Keyword(s):

Amino Acids ◽

Organic Acids ◽

Green Tea ◽

Extraction Techniques ◽

Phenolic Metabolites ◽

Organic Acids And Sugars

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The effects of lead on photosynthesis, 14C distribution among photoassimilates and transpiration of maize seedlings

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.1988.014 ◽

2014 ◽

Vol 57 (1) ◽

pp. 149-155 ◽

Cited By ~ 14

Author(s):

Jerzy W. Poskuta ◽

Eugeniusz Parys ◽

Elżbieta Romanowska ◽

Halina Gajdzis-Gujdan ◽

Barbara Wróblewska

Keyword(s):

Amino Acids ◽

Organic Acids ◽

Water Soluble ◽

Carbon Flow ◽

Maize Seedlings ◽

Dependent Inhibition ◽

Photosynthetic Products ◽

Sugar Phosphates ◽

Organic Acids And Sugars ◽

Treatment Concentration

Roots of whole 3 week-old seedlings of maize were exposed for 24 h to a solution of PbCl2. The concentrations of Pb were: 0, 200, 400, 800, 1200, 2400 mg dm-3. The amount of Pb taken up by roots was independent of the concentration of this element in the medium. The Pb taken up by shoots increased linearly with increasing treatment concentration. Pb caused: concentration-dependent inhibition of photosynthesis (PS), transpiration (T), 14CO2 uptake and incorporation of label into photosynthetic products. The largest limitation by Pb of the flow of photoassimilated carbon occurred into starch and sugar phosphates. Among the water-soluble photoassimilates, the largest limitation of carbon flow occurred into organic acids and sugars and the smallest into amino acids.

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Effects of Association of Barley Plants with Hydrocarbon-Degrading Bacteria on the Content of Soluble Organic Compounds in Clean and Oil-Contaminated Sand

Plants ◽

10.3390/plants10050975 ◽

2021 ◽

Vol 10 (5) ◽

pp. 975

Author(s):

Sergey Chetverikov ◽

Lidiya Vysotskaya ◽

Elena Kuzina ◽

Tatiana Arkhipova ◽

Margarita Bakaeva ◽

...

Keyword(s):

Organic Acids ◽

Organic Compounds ◽

Root Exudates ◽

Bacterial Production ◽

Plant Root ◽

Root Exudation ◽

Bacterial Inoculation ◽

Degrading Bacteria ◽

Petroleum Contaminated Soil ◽

Organic Acids And Sugars

Plant-bacteria consortia are more effective in bioremediation of petroleum contaminated soil than when either organism is used individually. The reason for this is that plant root exudates promote growth and activity of oil degrading bacteria. However, insufficient attention has been paid to the ability of bacteria to influence root exudation. Therefore, the influence of barley plants and/or bacterial inoculation (Pseudomonas hunanensis IB C7 and Enterobacter sp. UOM 3) on the content of organic acids, sugars and plant hormones in the eluate from clean and oil-polluted sand was studied separately or in combination. These strains are capable of oxidizing hydrocarbons and synthesizing auxins. Concentrations of organic acids and sugars were determined using capillary electrophoresis, and hormones by enzyme-linked immunosorbent assays. In the absence of plants, no sugars were detected in the sand, confirming that root exudates are their main source. Introducing bacteria into the sand increased total contents of organic compounds both in the presence and absence of oil. This increase could be related to the increase in auxin amounts in the sand eluate, as well as in plants. The results indicate that bacteria are able to increase the level of root exudation. Since auxins can promote root exudation, bacterial production of this hormone is likely responsible for increased concentrations of soluble organic compounds in the sand. Bacterial mediation of root exudation by affecting plant hormonal status should be considered when choosing microorganisms for phytoremediation.

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Root exudation of sugars, amino acids, and organic acids by maize as affected by nitrogen, phosphorus, potassium, and iron deficiency

Journal of Plant Nutrition and Soil Science ◽

10.1002/jpln.201000085 ◽

2010 ◽

Vol 174 (1) ◽

pp. 3-11 ◽

Cited By ~ 244

Author(s):

Lilia C. Carvalhais ◽

Paul G. Dennis ◽

Dmitri Fedoseyenko ◽

Mohammad-Reza Hajirezaei ◽

Rainer Borriss ◽

...

Keyword(s):

Amino Acids ◽

Iron Deficiency ◽

Organic Acids ◽

Root Exudation ◽

Nitrogen Phosphorus

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Chemistry of non-enzymic browning. II. Reactions between Amino Acids, Organic Acids, and sugars in freeze-dried Apricots and Peaches

Australian Journal of Chemistry ◽

10.1071/ch9570182 ◽

1957 ◽

Vol 10 (2) ◽

pp. 182 ◽

Cited By ~ 65

Author(s):

EFLJ Anet ◽

TM Reynolds

Keyword(s):

Amino Acids ◽

Amino Acid ◽

Organic Acids ◽

Malic Acid ◽

Water Soluble ◽

Freeze Dried ◽

Before And After ◽

Enzymic Browning ◽

Related Compounds ◽

Organic Acids And Sugars

The water-soluble constituents of apricot and peach purees were examined qualitatively and quantitatively before and after storage for 4 to 16 months at 25 �C and 70 per cent. R.H. All samples contained all the amino acids, organic acids, sugars, and polyols previously detected (Reynolds 1967 ; Anet and Reynolds 1955a, 1966b ; Ash and Reynolds 1955a, 1955b) in the two species of fruit. The stored samples also contained the following compounds : eleven 1-(N-amino acid)-1-deoxyfructoses, traces of two 2-(N-amino acid)-2-deoxyglucoses, nine by-products of unknown constitution formed from the reaction between glucose and aspartic acid and glucose and asparagine, three compounds formed from ammonia and glucose, two series of sucrose, glucose, and fructose mono-esters of malic acid, traces of a sorbitol mono-ester of malic acid, and some sugar mono-esters of citric acid.�The free amino acid or organic acid lost was equal, on a molar basis, to the amino acid-deoxyfructoses (and related compounds) and sugar esters formed. After allowing for these derivatives as much as 7 per cent. of the total sugar (calculated as hexoses) originally present could not be accounted for.

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